run iwyu on base!

base/message_loop.cc

Index: base/message_loop.cc
diff --git a/base/message_loop.cc b/base/message_loop.cc
index d83adccec08b56f8cdeb991c1b06af60d7a877e0..4cf0c8916ef7f61ffe3dab4810f920600fc866a5 100644
--- a/base/message_loop.cc
+++ b/base/message_loop.cc
@@ -2,17 +2,28 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/message_loop.h"
-
-#include <algorithm>
+#include <stdbool.h>
+#include <stddef.h>
+#include <string>
+#include <vector>
 
-#include "base/compiler_specific.h"
+#include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
+#include "base/message_loop.h"
+#include "base/message_pump.h"
 #include "base/message_pump_default.h"
 #include "base/metrics/histogram.h"
+#include "base/observer_list.h"
+#include "base/ref_counted.h"
+#include "base/synchronization/lock.h"
+#include "base/task.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "base/threading/thread_local.h"
+#include "base/time.h"
+#include "build/build_config.h"
+
+namespace tracked_objects { class Location; }
 
 #if defined(OS_MACOSX)
 #include "base/message_pump_mac.h"